expert in pro ##ger ##ia , dr . pen ##rose ( mark blu ##m ) , to trying to learn more about rapid aging , but dr . pen ##rose cannot help them further , though peter suspects he is hiding something . unseen by the fringe division , dr . pen ##rose visits an abandoned warehouse and meets the murderer , christopher ( derek cecil ) , his son , who suffers from rapid aging syndrome . pen ##rose warns christopher to be careful and that they only need one more woman to complete the process . by this time , charlie has found a recent murder victim killed in the same fashion as olivia ' s serial murderer . at walter ' s lab , they
expert in progeria, dr. penrose ( mark blum ), to trying to learn more about rapid aging, but dr. penrose cannot help them further, though peter suspects he is hiding something. unseen by the fringe division, dr. penrose visits an abandoned warehouse and meets the murderer, christopher ( derek cecil ), his son, who suffers from rapid aging syndrome. penrose warns christopher to be careful and that they only need one more woman to complete the process. by this time, charlie has found a recent murder victim killed in the same fashion as olivia's serial murderer. at walter's lab, they